Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh hai » thanh phan, thanh hoa, thanh san
chau tre » chay tren, chau tho, cho tre
hai chau » lai chau, ha chau, hat chau
hieu va » lieu va, hieu qua
vu sach » vu bach, su sach, vu khach
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
nang o » nang co, nang ho, nang ro
va cam » va cham, va cac, va cao
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (thuoc sach)) ky nang o hoi. hieu va cam ((xuc va) OR (tuc va)) thanh hai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (thuoc sach)) ky nang o hoi. hieu va cam ((xuc va) OR (tuc va)) thanh hai chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (thuoc sach)) ky nang o hoi. hieu va cam ((xuc va) OR (tuc va)) thanh hai chau tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (thuoc sach)) ky nang o hoi. hieu va cam ((xuc va) OR (tuc va)) thanh hai chau tre*.